EP0147822B1 - Device for detecting partial discharges - Google Patents

Device for detecting partial discharges Download PDF

Info

Publication number
EP0147822B1
EP0147822B1 EP84116064A EP84116064A EP0147822B1 EP 0147822 B1 EP0147822 B1 EP 0147822B1 EP 84116064 A EP84116064 A EP 84116064A EP 84116064 A EP84116064 A EP 84116064A EP 0147822 B1 EP0147822 B1 EP 0147822B1
Authority
EP
European Patent Office
Prior art keywords
phases
switchgear
switch
phase
polyphase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84116064A
Other languages
German (de)
French (fr)
Other versions
EP0147822B2 (en
EP0147822A3 (en
EP0147822A2 (en
Inventor
Uwe Dr.-Ing. Brand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trench Germany GmbH
Original Assignee
MWB Messwandler Bau AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MWB Messwandler Bau AG filed Critical MWB Messwandler Bau AG
Priority to AT84116064T priority Critical patent/ATE42641T1/en
Publication of EP0147822A2 publication Critical patent/EP0147822A2/en
Publication of EP0147822A3 publication Critical patent/EP0147822A3/en
Application granted granted Critical
Publication of EP0147822B1 publication Critical patent/EP0147822B1/en
Publication of EP0147822B2 publication Critical patent/EP0147822B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects

Definitions

  • the present invention relates to a measuring method for determining partial discharges according to the preamble of claim 1 and to an apparatus for carrying out this method according to the preambles of claims 3 and 6.
  • the invention ensures that the coupling capacity is always in the order of magnitude of the capacity of the switchgear part to be measured. It is therefore also possible to test large systems with high accuracy, and in addition with relatively small test transformers, since these no longer have to apply the capacitive power of the separate coupling capacitor as before. Furthermore, the sensitivity of the partial discharge measurement is practically independent of the size of the system to be tested, because the coupling capacity is in a fixed ratio to the capacity of the test object. In addition, no special coupling capacitor or any other device suitable for capacitive coupling is required at all.
  • a test transformer denotes a test transformer, the high-voltage winding 2 of which is connected to ground on one side and is connected with the high-voltage pole to a multi-phase diverter 3 designed as a three-phase diverter.
  • the latter has three switching arms 5, 6, 7 which can be rotated together about a central axis 4, of which, for example, the first-mentioned switching arm 5 is conductively connected to the test voltage connection.
  • the two other switching arms 6, 7 are isolated from the test voltage connection 8 and from one another, for example by isolators 9.
  • the switching arms 5, 6, 7 are arranged offset from each other by 120 °. Their end contacts E 5 , F-6, E 7 are opposed in the three-phase diverter 3 fixed test contacts P R , P s , P T , which are connected in an electrically conductive manner to the system conductors R or S or T for the purpose of checking a switchgear.
  • auxiliary contacts H R , H s , H T are provided at the same distance from the corresponding test contact, which contacts one of the insulated switching arms 6 and 7 with a connecting contact V 6 and V 7, respectively can be.
  • auxiliary contacts H R , H s , H T are guided to a measuring point M, which is connected to a partial discharge measuring device 10.
  • At measuring point M at least one measuring impedance 12 is also connected to ground.
  • the circuit present in the grounded housing 13 forms a four-pole, via which the measurement signal is passed to the partial discharge measuring device 10.
  • the measurement method according to the invention in which the system capacitances C K1 , C K2 and C K3 are used as coupling capacitances for the formation of measured values, gives very precise measurement results, and interference by stray interference can also be eliminated if the measurement impedances are also accommodated within the grounded housing 13 are. In this measuring method, he is only a multi-phase diverter with auxiliary contacts required, but no additional coupling capacitors are necessary.
  • a device for carrying out the method consists of the test transformer 1, the three-phase diverter 3, which is firmly connected to it, and the switchgear 14 to be tested, which is firmly connected to the latter.
  • the switching arms 5, 6, 7 of the three-phase diverter 3 can each be brought from the outside into a switching position rotated by 120 ° from the outside, the switching arms 5, 6, 7, as described above, interacting with the corresponding mating contacts.
  • the switching arms 5, 6, 7 are preferably directed obliquely outwards.
  • the common axis of rotation 4 is fastened directly in a post insulator at the coupling point to the test transformer 1 or in a gear part, which in turn is fastened in the post insulator.
  • FIGS. 1 and 2 another circuit diagram or a different embodiment of the three-phase diverter according to the invention is shown. The same parts are provided with the same reference numerals as in FIGS. 1 and 2.
  • the mechanical switch has only one contact arm 5, which is attached to a rotatable axis 4, which is connected directly to the high-voltage generator, the test transformer 1.
  • the switching arm 5 consisting of conductive material
  • one of the three test specimen phases is connected to the test voltage connection 8 via the test contacts P R , P s , P T.
  • additional switching devices Z R , Z s , Z T connected to the measuring point or the measuring impedance 12 are arranged, which by means of a hydraulic, magnetic or pneumatic drive via the auxiliary contacts H R , H s , H T can be contacted with the test contacts P R , P s , P T.
  • the measurement of the partial discharge intensity of the test object is carried out in such a way that, for. B. the test contact P R is connected via the switching arm 5 to the test transformer 1 and is thus connected to the test voltage.
  • the auxiliary switches H s and H T are closed by means of a corresponding control and connect these two phases of the test object to the measuring impedance (s) 12 and the partial discharge measuring device 10.
  • the switching arm 5 is driven via a handwheel 15 with a hydraulic, magnetic or pneumatic switching device, which is designed in such a way that the switch positions can be synchronized.
  • the corresponding switching lines are designated 16 in FIG. 4.
  • a multi-phase system with two or more than three conductors can also be provided.
  • the multi-phase diverter 3 is then to be designed according to the number of phases present.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Testing Relating To Insulation (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

1. A method of measurement for detection of partial discharges in polyphase metalclad switchgear with a testing transformer (1) which may be connected to the individual phases (R, S, T) of this switchgear (14) via a polyphase selector switch (3) and with a coupling capacitor (Ck1, Ck2 , Ck3 ) for the production of the return path between the phase to be tested and a measuring impedance, characterized in that as coupling capacitor (Ck1 , Ck2 , Ck3 ) the one phase or all of the phases (R, S, T) of the switchgear (14) not live are employed in such a way that their capacitance with respect to the live phase serves for the coupling-out of the partial discharge pulses.

Description

Die vorliegende Erfindung bezieht sich auf ein Meßverfahren zur Feststellung von Teilentladungen gemäß dem Oberbegriff des Anspruches 1 und auf eine Vorrichtung zur Durchführung dieses Verfahrens gemäß den Oberbegriffen der Ansprüche 3 und 6.The present invention relates to a measuring method for determining partial discharges according to the preamble of claim 1 and to an apparatus for carrying out this method according to the preambles of claims 3 and 6.

Ein derartiges Meßverfahren ist aus der DE-B-15 91 853 bekannt. Dort ist der Kopplungskondensator zur Vermeidung von Fehlerquellen infolge von Einstreuungen innerhalb der Metallkapselung des entsprechenden Schaltanlagenteils vorgesehen. Auch ist es aus dieser Schutzrechtsschrift bekannt, als Kopplungskondensator den Kondensatorbelag der Durchführung oder die Meßkapazität eines vorhandenen Spannungswandlers zu verwenden. Schließlich ist auch bereits darauf hingewiesen, daß dabei ein ungünstiges Verhältnis zwischen der Kapazität des Kopplungskondensators in der Größenordnung von etwa 100 pF und derjenigen der auf Teilentladung zu prüfenden Schaltkapazität in der Größenordnung von beispielsweise 5 nF vorliegt.Such a measuring method is known from DE-B-15 91 853. There, the coupling capacitor is provided to avoid sources of error due to interference within the metal encapsulation of the corresponding switchgear part. It is also known from this patent right to use the capacitor covering of the bushing or the measuring capacitance of an existing voltage converter as the coupling capacitor. Finally, it is already pointed out that there is an unfavorable ratio between the capacitance of the coupling capacitor in the order of magnitude of approximately 100 pF and that of the switching capacitance to be tested for partial discharge in the magnitude of, for example, 5 nF.

Mit der vorliegenden Erfindung wird ein Verfahren und werden Vorrichtungen vorgeschlagen, mit dem bzw. mit denen es ohne großen Aufwand möglich ist, mit Kapazitäten zu messen, die denen der Schaltanlagenkapazität wesentlich besser angepaßt sind.With the present invention, a method and devices are proposed with which or with which it is possible without great effort to measure with capacities which are much better matched to those of the switchgear capacity.

Diese Aufgabe wird durch die in den Ansprüchen 1, 3 und 6 angegebenen Merkmale gelöst.This object is achieved by the features specified in claims 1, 3 and 6.

Die Erfindung gewährleistet, daß die Kopplungskapazität immer in der Größenordnung der Kapazität des zu messenden Schaltanlagenteils liegt. Es können daher auch große Anlagen mit hoher Genauigkeit geprüft werden, und zwar noch dazu mit relativ kleinen Prüftransformatoren, da diese nicht mehr wie bisher die kapazitive Leistung des gesonderten Kopplungskondensators aufbringen müssen. Weiterhin ist die Empfindlichkeit der Teilentladungsmessung praktisch unabhängig von der Größe der zu prüfenden Anlage, weil die Kopplungskapazität in einem festen Verhältnis zur Kapazität des Prüflings steht. Außerdem ist überhaupt kein besonderer Kopplungskondensator oder ein anderes zur kapazitiven Auskopplung geeignetes Gerät erforderlich.The invention ensures that the coupling capacity is always in the order of magnitude of the capacity of the switchgear part to be measured. It is therefore also possible to test large systems with high accuracy, and in addition with relatively small test transformers, since these no longer have to apply the capacitive power of the separate coupling capacitor as before. Furthermore, the sensitivity of the partial discharge measurement is practically independent of the size of the system to be tested, because the coupling capacity is in a fixed ratio to the capacity of the test object. In addition, no special coupling capacitor or any other device suitable for capacitive coupling is required at all.

Weitere vorteilhafte Einzelheiten der Erfindung sind in den Unter- bzw. Nebenansprüchen angegeben und werden nachfolgend an Hand der in der Zeichnung veranschaulichten Ausführungsbeispiele näher beschrieben. Dabei zeigen :

  • Fig. 1 ein Schaltschema einer Meßanordnung zur Durchführung des erfindungsgemäßen Meßverfahrens mit drei auf einer zentralen Achse angeordneten Schaltarmen,
  • Fig. 2 eine erfindungsgemäße Prüfvorrichtung entsprechend Fig. 1 in der Seitenansicht,
  • Fig. 3 ein Schaltschema einer Meßanordnung zur Durchführung des erfindungsgemäßen Meßverfahrens mit mechanisch, magnetisch oder pneumatisch angetriebenen Kontakten und
  • Fig. 4 eine erfindungsgemäße Prüfvorrichtung entsprechend Fig. 3 in der Seitenansicht.
Further advantageous details of the invention are specified in the subclaims and dependent claims and are described in more detail below with reference to the exemplary embodiments illustrated in the drawing. Show:
  • 1 is a circuit diagram of a measuring arrangement for carrying out the measuring method according to the invention with three switching arms arranged on a central axis,
  • 2 a test device according to the invention corresponding to FIG. 1 in side view,
  • Fig. 3 is a circuit diagram of a measuring arrangement for performing the measuring method according to the invention with mechanically, magnetically or pneumatically driven contacts and
  • Fig. 4 shows a test device according to the invention corresponding to Fig. 3 in side view.

Mit 1 ist ein Prüftransformator bezeichnet, dessen Hochspannungswicklung 2 einseitig an Masse liegt und mit dem Hochspannungspol an einen als Dreiphasenumsteller ausgebildeten Mehrphasenumsteller 3 angeschlossen ist. Letzterer besitzt drei gemeinsam um eine zentrale Achse 4 drehbare Schaltarme 5, 6, 7, von denen beispielsweise der erstgenannte Schaltarm 5 leitend mit dem Prüfspannungsanschluß verbunden ist. Die beiden anderen Schaltarme 6, 7 sind vom Prüfspannungsanschluß 8 und voneinander beispielsweise durch Isolatoren 9 isoliert.1 denotes a test transformer, the high-voltage winding 2 of which is connected to ground on one side and is connected with the high-voltage pole to a multi-phase diverter 3 designed as a three-phase diverter. The latter has three switching arms 5, 6, 7 which can be rotated together about a central axis 4, of which, for example, the first-mentioned switching arm 5 is conductively connected to the test voltage connection. The two other switching arms 6, 7 are isolated from the test voltage connection 8 and from one another, for example by isolators 9.

Die Schaltarme 5, 6, 7 sind um jeweils 120° gegeneinander versetzt angeordnet. Ihren Endkontakten E5, F-6, E7 stehen im Dreiphasenumsteller 3 fest angeordnete Prüfkontakte PR, Ps, PT gegenüber, die zwecks Überprüfung einer Schaltanlage mit den Anlageleitern R bzw. S bzw. T elektrisch leitend verbunden sind.The switching arms 5, 6, 7 are arranged offset from each other by 120 °. Their end contacts E 5 , F-6, E 7 are opposed in the three-phase diverter 3 fixed test contacts P R , P s , P T , which are connected in an electrically conductive manner to the system conductors R or S or T for the purpose of checking a switchgear.

Neben den Prüfkontakten PR, Ps und PT sind jeweils im gleichen Abstand vom entsprechenden Prüfkontakt Hilfskontakte HR, Hs, HT vorgesehen, die mit je einem Verbindungskontakt V6 bzw. V7 eines der isolierten Schaltarme 6 bzw. 7 kontaktiert werden können.In addition to the test contacts P R , P s and P T , auxiliary contacts H R , H s , H T are provided at the same distance from the corresponding test contact, which contacts one of the insulated switching arms 6 and 7 with a connecting contact V 6 and V 7, respectively can be.

Die Hilfskontakte HR, Hs, HT sind an einen Meßpunkt M geführt, der mit einer Teilentladungs- Meßvorrichtung 10 verbunden ist.The auxiliary contacts H R , H s , H T are guided to a measuring point M, which is connected to a partial discharge measuring device 10.

Die Messung erfolgt mit dieser Teilentladungs- Meßvorrichtung 10 wie folgt :

  • Es sei angenommen, der Dreiphasenumsteller 3 nehme die in der Fig. 1 gezeichnete Stellung ein. Dabei wird die Phase R der Schaltanlage auf Teilentladung geprüft. Dies ist durch die zwischen der Phase R und dem an Masse liegenden Gehäuse 11 eingezeichnete Kapazität Cx angedeutet. Weiterhin sind noch die zwischen den einzelnen Phasen R, S, T vorhandenen und als Kopplungskapazitäten verwendeten Schaltanlagenkapazitäten CK1, CK2 und CK3 vorhanden. Die Kapazität Cx ist hierbei also immer im Größenordnungsbereich der Kapazitäten CK1, CK2 und CK3, da sich all diese Kapazitäten entsprechend der Größe der Schaltanlage einstellen.
The measurement is carried out with this partial discharge measuring device 10 as follows:
  • It is assumed that the three-phase diverter 3 takes the position shown in FIG. 1. Phase R of the switchgear is checked for partial discharge. This is indicated by the capacitance C x drawn in between the phase R and the housing 11 connected to ground. Furthermore, the switchgear capacitances C K1 , C K2 and C K3 present between the individual phases R, S, T and used as coupling capacitances are still present. The capacitance Cx is therefore always in the order of magnitude of the capacitances C K1 , C K2 and C K3 , since all these capacitances are set in accordance with the size of the switchgear.

Am Meßpunkt M ist noch wenigstens eine Meßimpedanz 12 nach Masse geschaltet. Die im nach Masse geschalteten Gehäuse 13 vorhandene Schaltung bildet einen Vierpol, über den das Meßsignal an die Teilentladungs-Meßvorrichtung 10 geleitet wird.At measuring point M, at least one measuring impedance 12 is also connected to ground. The circuit present in the grounded housing 13 forms a four-pole, via which the measurement signal is passed to the partial discharge measuring device 10.

Durch das erfindungsgemäße Meßverfahren, bei dem die Anlagenkapazitäten CK1, CK2 und CK3 als Kopplungskapazitäten zur Meßwertbildung verwendet werden, erhält man sehr genaue Meßergebnisse, wobei eine Beeinflussung durch Einstreuungen ebenfalls ausgeschaltet werden kann, wenn die Meßimpedanzen ebenfalls innerhalb des geerdeten Gehäuses 13 untergebracht sind. Bei diesem Meßverfahren ist also lediglich ein Mehrphasenumsteller mit Hilfskontakten erforderlich, jedoch sind keinerlei zusätzliche Kopplungskondensatoren notwendig.The measurement method according to the invention, in which the system capacitances C K1 , C K2 and C K3 are used as coupling capacitances for the formation of measured values, gives very precise measurement results, and interference by stray interference can also be eliminated if the measurement impedances are also accommodated within the grounded housing 13 are. In this measuring method, he is only a multi-phase diverter with auxiliary contacts required, but no additional coupling capacitors are necessary.

Eine Vorrichtung zur Durchführung des Verfahrens besteht gemäß Fig. 2 aus dem Prüftransformator 1, dem mit diesem fest verbundenen Dreiphasenumsteller 3 und der mit letzterem fest verbundenen, zu prüfenden Schaltanlage 14.According to FIG. 2, a device for carrying out the method consists of the test transformer 1, the three-phase diverter 3, which is firmly connected to it, and the switchgear 14 to be tested, which is firmly connected to the latter.

Die Schaltarme 5, 6, 7 des Dreiphasenumstellers 3 können über ein Handrad 15 von außen jeweils in eine um 120° gedrehte Schaltstellung gebracht werden, Wobei die Schaltarme 5, 6, 7, wie oben beschrieben, mit den entsprechenden Gegenkontakten zusammenwirken. Die Schaltarme 5, 6, 7 sind dabei vorzugsweise schräg nach auswärts gerichtet. Die gemeinsame Drehachse 4 ist unmittelbar in einem Stützisolator an der Kopplungsstelle zum Prüftransformator 1 befestigt oder in einem Getriebeteil, das seinerseits im Stützisolator befestigt ist.The switching arms 5, 6, 7 of the three-phase diverter 3 can each be brought from the outside into a switching position rotated by 120 ° from the outside, the switching arms 5, 6, 7, as described above, interacting with the corresponding mating contacts. The switching arms 5, 6, 7 are preferably directed obliquely outwards. The common axis of rotation 4 is fastened directly in a post insulator at the coupling point to the test transformer 1 or in a gear part, which in turn is fastened in the post insulator.

In den Fig. 3 und 4 ist ein anderes Schaltschema bzw. eine andere Ausführung des erfindungsgemäßen Dreiphasenumstellers dargestellt. Die gleichen Teile sind mit den gleichen Bezugsziffern wie in den Fig. 1 und 2 versehen.3 and 4, another circuit diagram or a different embodiment of the three-phase diverter according to the invention is shown. The same parts are provided with the same reference numerals as in FIGS. 1 and 2.

Bei dieser Ausführung besitzt der mechanische Schalter nur noch einen Kontaktarm 5, der an einer drehbaren Achse 4 befestigt ist, die direkt mit dem Hochspannungserzeuger, dem Prüftransformator 1, verbunden ist. Je nach Stellung des aus leitfähigem Material bestehenden Schaltarmes 5 wird eine der drei Prüflingsphasen über die Prüfkontakte PR, Ps, PT mit dem Prüfspannungsanschluß 8 verbunden.In this embodiment, the mechanical switch has only one contact arm 5, which is attached to a rotatable axis 4, which is connected directly to the high-voltage generator, the test transformer 1. Depending on the position of the switching arm 5 consisting of conductive material, one of the three test specimen phases is connected to the test voltage connection 8 via the test contacts P R , P s , P T.

Neben den Prüfkontakten PR, Ps, PT sind jeweils mit dem Meßpunkt bzw. der Meßimpedanz 12 verbundene Zusatzschalteinrichtungen ZR, Zs, ZT angeordnet, die mittels eines hydraulischen, magnetischen oder pneumatischen Antriebes über die Hilfskontakte HR, Hs, HT mit den Prüfkontakten PR, Ps, PT kontaktiert werden können.In addition to the test contacts P R , P s , P T , additional switching devices Z R , Z s , Z T connected to the measuring point or the measuring impedance 12 are arranged, which by means of a hydraulic, magnetic or pneumatic drive via the auxiliary contacts H R , H s , H T can be contacted with the test contacts P R , P s , P T.

Die Messung der Teilentladungsintensität des Prüflings erfolgt derart, daß z. B. der Prüfkontakt PR über den Schaltarm 5 mit dem Prüftransformator 1 verbunden und somit an Prüfspannung gelegt wird. Über eine entsprechende Steuerung werden die Hilfsschalter Hs und HT geschlossen und verbinden diese beiden Phasen des Prüflings mit der bzw. den Meßimpedanzen 12 und der Teilentladungsmeßvorrichtung 10.The measurement of the partial discharge intensity of the test object is carried out in such a way that, for. B. the test contact P R is connected via the switching arm 5 to the test transformer 1 and is thus connected to the test voltage. The auxiliary switches H s and H T are closed by means of a corresponding control and connect these two phases of the test object to the measuring impedance (s) 12 and the partial discharge measuring device 10.

Der Antrieb des Schaltarmes 5 erfolgt wie bei der Ausführung gemäß Fig. 2 über ein Handrad 15 mit einer hydraulischen, magnetischen oder pneumatischen Schalteinrichtung, die derart ausgebildet ist, daß eine Synchronisation der Schalterstellungen möglich ist. Die entsprechenden Schaltleitungen sind in Fig. 4 mit 16 bezeichnet.As in the embodiment according to FIG. 2, the switching arm 5 is driven via a handwheel 15 with a hydraulic, magnetic or pneumatic switching device, which is designed in such a way that the switch positions can be synchronized. The corresponding switching lines are designated 16 in FIG. 4.

Die Vorteile, wie sie vorstehend in Verbindung mit dem Ausführungsbeispiel gemäß den Fig. 1 und 2 angegeben worden sind, gelten auch für die Ausführungsvariante gemäß den Fig. 3 und 4.The advantages as stated above in connection with the exemplary embodiment according to FIGS. 1 and 2 also apply to the variant according to FIGS. 3 and 4.

Anstelle des beschriebenen Dreiphasensystems kann auch ein Mehrphasensystem mit zwei oder mehr als drei Leitern vorgesehen sein. Der Mehrphasenumsteller 3 ist dann entsprechend der Zahl der vorhandenen Phasen auszugestalten.Instead of the three-phase system described, a multi-phase system with two or more than three conductors can also be provided. The multi-phase diverter 3 is then to be designed according to the number of phases present.

Claims (7)

1. A method of measurement for detection of partial discharges in polyphase metalclad switchgear with a testing transformer (1) which may be connected to the individual phases (R, S, T) of this switchgear (14) via a polyphase selector switch (3) and with a coupling capacitor (CK1, CK2, CK3) for the production of the return path between the phase to be tested and a measuring impedance, characterized in that as coupling capacitor (CK1, CK2, CK3) the one phase or all of the phases (R, S, T) of the switchgear (14) not live are employed in such a way that their capacitance with respect to the live phase serves for the coupling-out of the partial discharge pulses.
2. A method of measurement as in Claim 1, characterized in that for the coupling-out of the partial discharge pulses a polyphase selector switch (3) is employed in such a way that on one side it connects the testing transformer (1) to the phase to be tested and on the other side it connects the phases not live to the partial discharge measurement terminal (M).
3. A device for the performance of the method as in Claim 1 or 2, characterized in that the polyphase selector switch (3) exhibits to correspond with the number of phases (R, S, T) a number of switch arms (5, 6, 7) which are offset from one another by an angle corresponding with the round angle divided by the number of phases, that a fixed opposite contact (PR, Ps, PT) is associated with each switch arm contact (E5, E6, E7), that one of the switch arms (5) is connected conductively to a test voltage terminal (8) and the other switch arms (6, 7) are insulated from it and from one another, and that with each insulated switch arm (6, 7) is associated and connected conductively to it a connector contact (V6, V7) which, depending upon the position of the switch arms (5, 6, 7), may be brought into contact with an auxiliary contact (HR, Hs, HT) provided next to a test contact (PR, PS, PT).
4. A device as in Claim 3, characterized in that the switch arms (5, 6, 7) are directed outwards as seen from the test voltage terminal (8).
5. A device as in Claim 3 or 4, characterized in that the switch arms (5, 6, 7) may be turned about a shaft (4) supported in a supporting insulator (16).
6. A device for the performance of the method as in Claim 1 or 2, characterized in that the polyphase selector switch (3) exhibits only one switch arm (5) which is connected conductively to a test voltage terminal (8) and depending upon its position at the time connects the opposite contacts (PR, Ps, PT) associated with the individual phases (R, S, T) conductively to the test voltage terminal (8), and that with each opposite contact (PR, Ps, PT) is associated a hydraulically, magnetically or pneumatically operated switching equipment (ZR, ZS, ZT) which by means of the auxiliary contacts (HR, Hs, HT) connects to the measuring impedance (12) the respective phases (R, S, T) of the switchgear (14) to be tested.
7. A device as in Claim 6, characterized in that the hydraulically, magnetically or pneumatically operated switching equipments (ZR, Zs, ZT) may be controlled in such a way that the phases (R, S, T) of the switchgear to be tested, which at the time are not connected via the switch arm (5) to the source of test voltage, are connected to the measuring impedance (12) via the switching equipments (ZR, ZS, ZT).
EP84116064A 1983-12-28 1984-12-21 Device for detecting partial discharges Expired - Lifetime EP0147822B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84116064T ATE42641T1 (en) 1983-12-28 1984-12-21 MEASURING METHOD FOR DETECTING PARTIAL DISCHARGE AND DEVICE FOR CARRYING OUT THESE METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833347275 DE3347275A1 (en) 1983-12-28 1983-12-28 MEASURING METHOD FOR DETECTING PARTIAL DISCHARGES AND DEVICE FOR IMPLEMENTING THIS METHOD
DE3347275 1983-12-28

Publications (4)

Publication Number Publication Date
EP0147822A2 EP0147822A2 (en) 1985-07-10
EP0147822A3 EP0147822A3 (en) 1985-08-07
EP0147822B1 true EP0147822B1 (en) 1989-04-26
EP0147822B2 EP0147822B2 (en) 1992-05-13

Family

ID=6218281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116064A Expired - Lifetime EP0147822B2 (en) 1983-12-28 1984-12-21 Device for detecting partial discharges

Country Status (4)

Country Link
EP (1) EP0147822B2 (en)
JP (1) JPH0672905B2 (en)
AT (1) ATE42641T1 (en)
DE (2) DE3347275A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126868A1 (en) * 1991-08-14 1993-02-18 Asea Brown Boveri Partial discharge pulse detecting arrangement in gas insulated HV system - contains measurement points at boundaries of sub-regions of system which produce logical direction signals for evaluation of discharge location

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2008898C (en) * 1989-10-25 1998-11-24 Takeshi Endoh Method for detecting partial discharge in an insulation of an electric power apparatus
CN101839960B (en) * 2010-04-09 2012-05-23 江苏雷宇高电压设备有限公司 Complete power-frequency oil-gas partial discharge-free test transformer equipment
CN107831424B (en) * 2017-11-27 2024-04-02 许继（厦门）智能电力设备股份有限公司 Be used for GIS interval withstand voltage test testing arrangement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2344261A (en) * 1941-08-11 1944-03-14 Gen Electric Dielectric monitor system
US3522404A (en) * 1967-11-22 1970-08-04 Frank C Trayer Totally enclosed component
DE2628453A1 (en) * 1976-06-22 1978-01-05 Siemens Ag Insulation testing terminal for multiphase encapsulated switchgear - employs movably mounted HV switch controlled by external drive and coupled to one pole
NL7808616A (en) * 1978-08-21 1980-02-25 Coq Bv COMPLETELY CLOSED 3-PHASE SWITCH.
DE2856354C2 (en) * 1978-12-27 1986-06-26 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Device for testing metal-enclosed high-voltage systems for partial discharges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126868A1 (en) * 1991-08-14 1993-02-18 Asea Brown Boveri Partial discharge pulse detecting arrangement in gas insulated HV system - contains measurement points at boundaries of sub-regions of system which produce logical direction signals for evaluation of discharge location

Also Published As

Publication number Publication date
DE3477969D1 (en) 1989-06-01
EP0147822B2 (en) 1992-05-13
EP0147822A3 (en) 1985-08-07
EP0147822A2 (en) 1985-07-10
JPH0672905B2 (en) 1994-09-14
DE3347275A1 (en) 1985-07-11
JPS60158360A (en) 1985-08-19
ATE42641T1 (en) 1989-05-15

Similar Documents

Publication Publication Date Title
DE2341073B2 (en) Measuring device for the voltage in an encapsulated high-voltage switchgear
DE2548173C3 (en) Device for detecting a high-voltage potential in metal-enclosed high-voltage switchgear and equipment
EP0241764A1 (en) Process and devices for detecting and localizing damages in electrical installations
DE2328120B2 (en) Device arrangement for testing metal-encapsulated high-voltage systems
DE3327917A1 (en) MEASURING DEVICE FOR DETECTING PARTIAL DISCHARGES WITHIN METAL-ENCLOSED, PRESSURE GAS-INSULATED HIGH-VOLTAGE SWITCHGEAR
WO1990005919A1 (en) Coupling unit for monitoring high-voltage installations by means of partial discharges
DE2139225A1 (en) Encapsulated high-voltage system with compressed gas and a capacitive voltage divider
EP0069693A2 (en) Cylindrical container for a three-pole metal-clad gas-insulated high-voltage switchgear
EP0147822B1 (en) Device for detecting partial discharges
DE3521945A1 (en) DISCONNECTOR FOR A METAL-ENCLOSED, PRESSURE-GAS INSULATED HIGH-VOLTAGE SWITCHGEAR
DE4414828C2 (en) High voltage converter
DE4002603A1 (en) Voltage tester with two test probes - has probes connected by single core cable and voltage measuring element and voltage indicator arranged in handles
DE2354978B2 (en) DEVICE FOR DETECTION OF THE IGNITION VOLTAGE
DE2628453A1 (en) Insulation testing terminal for multiphase encapsulated switchgear - employs movably mounted HV switch controlled by external drive and coupled to one pole
DE69308446T2 (en) Device for detecting faults on an underground electrical power distribution network
EP0045715B1 (en) High-voltage metal-clad gas-insulated equipment
DE3403655A1 (en) Device for indicating an electrical voltage
DE2821049A1 (en) Hermetically sealed gas insulated switchgear system - has earthing switch operating through bellows arrangement to maintain seal
DE4107725C1 (en) Encapsulated three=phase medium voltage switchgear - is filled with insulating gas with diverters mounted in series and transformers in outlet chamber
EP0678890A1 (en) Method and device for detecting the state of automatic cut-outs
DE19648643A1 (en) Metal encapsulated gas insulated switchgear enclosure with earthing
DE1766502C (en) Arrangement at direct and alternating current measuring bridges
DE3504830C2 (en)
DE2055477C3 (en) Method for monitoring the resistance of contact arrangements, in particular switches, containing high-voltage conductors in fully insulated switchgear
DE543484C (en) Device for checking the dielectric losses of small pieces of capacitive, operationally laid cables or of cable accessories of an electrical system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

17P Request for examination filed

Effective date: 19841221

AK Designated contracting states

Designated state(s): AT BE CH DE FR LI SE

AK Designated contracting states

Designated state(s): AT BE CH DE FR LI SE

17Q First examination report despatched

Effective date: 19870211

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19890426

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19890426

Ref country code: BE

Effective date: 19890426

REF Corresponds to:

Ref document number: 42641

Country of ref document: AT

Date of ref document: 19890515

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3477969

Country of ref document: DE

Date of ref document: 19890601

EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19891221

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: RHEINISCH-WESTFAELISCHES ELEKTRIZITAETSWERK AG

Effective date: 19900124

RTI2 Title (correction)

Free format text: DEVICE FOR DETECTING PARTIAL DISCHARGES.

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19920513

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH DE FR LI SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011219

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20011221

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030701

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL